10211211001021 has 2 divisors, whose sum is σ = 10211211001022. Its totient is φ = 10211211001020.

The previous prime is 10211211001009. The next prime is 10211211001037. The reversal of 10211211001021 is 12010011211201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10038828264921 + 172382736100 = 3168411^2 + 415190^2 .

It is a cyclic number.

It is not a de Polignac number, because 10211211001021 - 2¹⁵ = 10211210968253 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10211211000992 and 10211211001010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10211211007021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5105605500510 + 5105605500511.

It is an arithmetic number, because the mean of its divisors is an integer number (5105605500511).

Almost surely, 2^{10211211001021} is an apocalyptic number.

It is an amenable number.

10211211001021 is a deficient number, since it is larger than the sum of its proper divisors (1).

10211211001021 is an equidigital number, since it uses as much as digits as its factorization.

10211211001021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 10211211001021 its reverse (12010011211201), we get a palindrome (22221222212222).

The spelling of 10211211001021 in words is "ten trillion, two hundred eleven billion, two hundred eleven million, one thousand, twenty-one".